baldwin



(No Model.) 2 Sheets-Sheet 1.

, fC. W. BALDWIN.

GAS ENGINE.

Patented May 1, 1883.

N. PETERS. mm-umgnplm. w-mingvem n. c.

.l (NoMdel.) 2 Sheets-Sheet 2.

C. W. BALDWIN.

GAS ENGINE.

Patented May 1 N, MYERS. Mmlixhmpher, washington. DJ;

4UNITED STATES PATENT OFFICE.

CYRUS VlBALDWI-N, OF CHICAGO, ILLINOIS,l ASSIGNOR TO WILLIAM E.

` HALE, OF SAME PLACE.

'GAS-ENGINE.

SPECIFICATION forming' part of Letters Patent No. 276,747, dated May 1,`1883.

Application filed October 20, 1882. (No model.)

V.To all whom it may concern:

cessity of starting them by hand, or by some power stored up for thepurpose. l

To avoid the necessity ot' constant attend ance andimanipulation, orofusing a secondary startin g-en gine operated by power derived from theoperation ot' the main engine, I use means whereby.a charge of explosivegases may be carried into the explosion cylinder ,while the engineis atrest, and there exploded to impart the initial movements. I propose touse different means for effecting' this result. One,which is simple andeffective, is illustrated in the drawings-in section inV Figure l, inplan, Fig. 2, and in detail, Fig. 3.

As shown, the engine is similar in many of its features to that forwhich I made application for Letters Patent August 10, 1889- that is,there is an explosion-cylinder, A, containing a piston, B, connected bya pitman to the crank of a shaft, O, a compression-cy linder, D, shorterand broader than the main cylinder, and provided with inlet air and gasports, and with a piston, the rod E of which is connected with aneccentric, E, through the medium ot' a pitmau-rod, E2. drawn into thecylinder D, forced through a channel, e, into the cylinder A, andexploded when the piston B uncovers an igniting-open- ,ing,c, acheck-valve at f in the passage eclosing on its seat to obstruct saidpassage at the time of the explosion. On the forward movement of thepiston in the direction ot' its arrow a valve, h, in the piston isopened to permit the waste gases to pass through a channel, g, in thepiston, and out at one side to a port, w, leading to a pipe by which thegases are conducted to a reservoir, A', or elsewhere. The movements ofthe valveh are regulated from the pitman or connecting rod b, which hasupon it a finger, a., opposite an arni, j, on the end of the valve-rodli', so that as the Ipitman de- The air and gas mixed are scends below ahorizontal line the rod It will be moved back and thevalve lifted. Aspring, k, may be used to return the valve to its seat; or a positiveconnection ot' any suitable kind may be made with the pitman. Any otherde vice for opening the valve h positively maybe employed.

The pitman Eis connected to the piston-rod E through the medium of alink, E4, forming part of the piston-rod, and having a triangularopening, through which passes the crosspin c ot' the pitman. The rearedge, .not the opening in the link coincides with the periphery ofacircle having the axis ot' the shaft O as its center. The other edge,x', is at an angle of about thirty degrees to the edge rc.

A brake-lever, Z, having a limited, motion, extends below the ily-wheelY, and an arm, Vv', embracing at its rear end an eccentric, m, on theshaft O, has a shoulder, y, adapted to catch beneath the end of thebrake'lever Z. The arm W is suspended from the pitman E2 by a link orchain, u, or otherwise, so that it will have a limited downward motion,but be capable ot' rising under the action of the governor connected toit in any suitable manner. As shown, a link,p, slotted to receive a pin,p', on the arm W, is connected to a lever, F, the opposite end of whichis attached to the rod H ofthe governor.

During the movement of the engineunder the successive explosions ot' themixed gases there is nothing peculiar beyond what has alreadybeen setforth, the pin u of the pitlnan being at the upper end of the link EL,the arm W being suspendedfrom the pitman E2, away `from contact with thebrake-lever Z, and the link p playing freely on the pin p under theaction of the governor.

When it is desired to arrest the engine in position for automaticstarting, the pitman E2 is thrown down until its pin 'v rests on thehorizontal edge of the opening in the link, when the piston-rod E willhe drawn out to its full extent (shown in full lines, Fig.. 3) by thebackward movement of the pitman, drawing a charge of mixed gases intothe cylinder D. As the shaft C continues to revolve, the pin n slidesback and forth upon the horizontal edge ofthe link-opening withoutchanging the roo" position to which the charging-piston has been set. Asthe ,pitman is lowered the link u descends, and the arm W would fallupon the brake-lever if it were not held up by the link 5 p; but as thegovernor-balls drop as the engine slows, the link p will be carrieddownward, and the shoulder y of the reciprocating arm W will finallycatch upon the end of the brake-lever and draw the brake-shoe againstthe ily-wheel, arresting the rotation thereof. As the brake cannot beapplied until the. engine has nearly ceased its motion, the movementwill be at once arrested on the application of the brake, so that theengine is made to stop at the predetermined point-*that is, with themain piston B just back of the ignitinghole c, and with the pin c at theforward end 1 of the opening in the link, the gas-jet being lighted.

The engine can at any time be started by lifting the loose end of thepitman E2, which releases the brake and brings the pin e upon theinclined edge x of the link E, thus moving forward the piston-rod E andits piston to the position shown in dotted lines, Fig. 3, so as to forcea charge of gases into the main cylinder, where they will be ignited bythe gasilame, and by their; explosion will impart the necessary initialmovements to the engine. By thus arresting the engine always at the samepoint witha charge iu the compression-cylinder,.and by expelling thelatter and forcing it into the main cylinder and igniting it withoutturning the main shaft, I am enabled at any time to start the enginewith the application of but such slightpower as is generally required toimpartmotion to engines driven by steam, air, Snc., where it isnecessary only to turn a cock or move a lever.

I wish it to be understood that while the above-described novel devicesare most effective I do not limit myself to their use, as the principlesof my invention may be elnbodied in other devices. For instance, otherhand devices than those described may be used for foroinga charge intothe cylinder after the parts have been arrested in the proper position.For instance7 a pitman in two jointed sections capable of being broughtinto line or bent atan angle may be substituted for the pitman and linkdescribed, the charge may be ignited by an electric spark generated onthe raising of thc pitman, and exploding the gases or igniting a gas-jetwhich explodes the gases, and wholly diiferent brake and governingmechanism for stopping the engine at the desired point will occur to anypractical mechanic. The pitman will be set by different means, accordingto the application of the engine. When used for lifting elevator-cars,the pitman is connected to the hand-rope Q, of the elevator, so as to beoperated fromthe car. 1

It will be obvious that in some casesm-as in light engines-the brake maybe operated without the interposition ofthe governor, and that theappliances for arresting the compression-piston when the cylinder isfull may be used without the brake, the ily-wheel being -loaded to bringthe-parts to rest always in the same position.

I do not abandon or dedicate to the public any patentable features setforth herein and not hereinafter claimed, but reserve the `right toclaim the same, either in a reissue of any patent that may be grantedupon this application, or in other applications for Letters Patent thatI may make.

I therefore claiml. The combination, in a gas-engine, of appliances forarresting the motion with the parts always in the same position, andhand devices for forcing a charge of gases into the main cylinderandthere exploding it, without any movement of the main engine,substantially as set forth.

2. The combination ofthe arresting devices constructed to always stopthe engine with a charge in the compression-cylinder, and appliances forexpelling said charge into and exploding it iu the main cylinder withoutrst operating the main piston, substantially as set forth. v

8. The combination of the main cylinder and piston, having anigniting-opening and constant flame, or its equivalent, and thecharging-cylinder, and appliances whereby the engine is'automaticallyarrested Ywith a chargein the charging-cylinder, and with the mainpiston at the rear of the igniting-opening, substantially as set forth.

4. The combination, with the charging-cylinder and appliances foroperating its piston, of an intermediate connection constructed topermit the piston to be thrown out of control of such appliances afterthe charge is in the cylinder, and-to expel said charge by the act ofrestoring such parts to position, substantially as set orth.

5. The 'combination of the charging-cylinder, piston and piston-rod, thepitman driven from the main engine, and intermediate linkconnectionconstructed to permit a play of the pitman independently of the piston,as and for the purpose set forth.

6. The combination of the cylinder D, its piston, rod, and link, havinga triangular opening, and the pin e, extending through said opening,substantially' as set forth.

7. The combination of the charging-cylinder,.pitman and intermediateadjustable connection, and a bra-ke and appliances for operating it uponthe change in adjustment of the said connection, whereby the brakev isremoved when the charge is expelled from the cylinder, substantially asset forth.

8. The combination, with a gas-engine, ofa brake andv appliances,substantially as set forth, whereby the brake is applied automaticallyto arrest the motion of thc engine when the charging-cylinder is full,substantially as specified.

9. The combination, with a gas-engine, of a IOC)l IOS IIO

brake device and appliances constructed to kai tween the same and thearm W, substantially as set forth.

In testimony whereofl have signed my name to this specification in thepresence of two sub-r scribing Witnesses.

oYRUs W. BALDWIN.

\ Witnesses:

EL L. KENT, HOLMES HOGE.

